1
Richard N Fargo: Three-way solenoid valve. Honeywell, Mitchell J Halista, Trevor B Joike, April 15, 1986: US04582294 (40 worldwide citation)

A three-way solenoid valve uses a movable armature housed in a coaxial sleeve and having longitudinal fluid channels on its outer surface and a fluid sealing element on both ends. A first fluid sealing element on a first end of the armature is a resilient ring arranged to cooperate with an adjacent ...


2
Richard N Fargo: Two-stage solenoid valve. Honeywell, Mitchell J Halista, Trevor B Joike, November 25, 1986: US04624282 (20 worldwide citation)

A two-stage solenoid valve uses a pair of stacked coaxial armatures in a cylindrical sleeve housing. A first armature is provided with a fluid sealing ring and is urged by a first spring to peripherally seal an adjacent internal fluid port in a valve base supporting a first end of the sleeve housing ...


3
Richard N Fargo, Gerard Sirigu, Helmut Schröder Brumloop, Joseph J Barna, Barry G Blackaby: Elevator rescue system. Otis Elevator Company, March 6, 2001: US06196355 (19 worldwide citation)

An elevator rescue system includes a power source of back-up electrical power. A manually-operated, rescue enable switch switchably permits the transmission of electrical power from the power source to a motor brake coil of an elevator car during a rescue operation such that the energized coil relea ...


4
Richard N Fargo, Sib S Ray, Louis Bialy, Henry Ryder: Hydraulic elevator muffler. Otis Elevator Company, Lloyd D Doigan, April 7, 1992: US05101930 (19 worldwide citation)

A muffler for attenuating pulsations within the hydraulic fluid of an hydraulic elevator includes a plurality of compressible elements for absorbing pressure pulsations within the fluid and a baffle for ensuring that the flow of fluid contacts the elements sufficiently to absorb such pulsations, the ...


5
Richard N Fargo, Gerard Sirigu, Helmut Schröder Brumloop, Joseph J Barna, Barry G Blackaby: Elevator rescue system. Otis Elevator Company, August 7, 2001: US06269910 (14 worldwide citation)

An elevator rescue system includes a power source of back-up electrical power. A manually-operated, rescue enable switch switchably permits the transmission of electrical power from the power source to a motor brake coil of an elevator car during a rescue operation such that the energized coil relea ...


6
Mark E Shepard, Richard N Fargo, Harold Terry: Acceleration damping of elevator resonant modes and hydraulic elevator pump leakage compensation. Otis Elevator Company, June 3, 1997: US05635689 (13 worldwide citation)

A speed command signal is applied to a variable voltage, variable frequency controller for driving a three-phase induction motor that operates a positive displacement pump for supplying fluid to a hydraulic elevator drive cylinder. An accelerometer mounted on the car provides an acceleration-related ...


7
Richard N Fargo: Hydraulic elevator control valve. Otis Elevator Company, William W Jones, May 14, 1991: US05014824 (12 worldwide citation)

The flow of hydraulic fluid to and from an hydraulic elevator piston is controlled by a motor-actuated spool valve operated by a microprocessor. To lower the elevator, a main check valve is opened by a down piston using hydraulic fluid from the system. Pressure is equalized on both sides of the main ...


8
Richard N Fargo, Helio Tinone: Elevator system with counter-rotating drive sheaves. Otis Elevator Company, February 12, 2002: US06345695 (11 worldwide citation)

An elevator system including two counter rotating drive sheaves and a drive rope frictionally engaging both drive sheaves to position an elevator car within a hoistway.


9
Richard N Fargo: Method for generating velocity profiles for elevator car doors. Otis Elevator Company, January 12, 1999: US05859395 (8 worldwide citation)

A method for generating velocity profiles for elevator car doors includes a step of generating a straight line velocity versus time profile. The profile is then passed through a low pass finite impulse response filter to smooth the transition between different velocity and acceleration values and to ...


10
Richard N Fargo, Harold Terry, Frank M Sansevero, Boris Traktovenko, John Milton Benoit, David Sirag, Arthur Hsu, John Ferrisi: Elevator system with multiple cars in a hoistway. Otis Elevator Company, Carlson Gaskey & Olds PC, November 13, 2012: US08307952 (7 worldwide citation)

An elevator system (20) includes multiple elevator cars (22, 32) within a hoistway (26). Counterweights (24, 34) are associated with the respective elevator cars (22, 32) by load bearing members (40, 50). In some examples, different roping ratios are used for the load bearing members (40, 50). In so ...